12 Reft. 
REPTILTA. 
OPHIDIA. 
Geographical distribution: — Of the 25 families of Snakes, 6 are found 
in the Nearctic region, 10 in the Paljearctic, 13 in the Australian, 16 in 
the Neotropical, 17 in the Ethiopian, and no less ihan 22 in the Oriental. 
The only -regions that possess altogether peculiar families of this class 
are the Ethiopian (3) and the Oriental (2). 
The distribution of the genera peculiar to or highly characteristic of 
the several regions is as follows: — Nearctic, 9 (4 Crotalidce^ 1 Pythonidce, 
A Coluhrid(P)-, Palasarctic, 2 peculiar ((7oZw6n^7^e 2 iVidi Grotalidce) \ Ethio- 
pian, 25, belonging to 11 families {Coluhridcz 4, Lycodontidm 5, Elapidce^ 
3) ; Oriental, 50, belonging to 15 families (Coluhridce 5, Uropeltidce 5, 
Homalop sided 12, Lycodontidee G, Amhlycephalidcd 3, Elapidcd 8, Crota- 
lidcd 4) ; Australian, 16 {Elapidee 11, Fythonidee 4) ; Neotropical, about 
24 (Colubridee 10, Pythonidee 6, Dipsadidee, Scytalidce, Amhlycephalidcd^ 
Elapidcd^ and Crotalidce). A. Wallace, Geogr. Distr. ii. pp. 386 & 387. 
Tomes, C. On the Development and Succession of the Poison-fangs 
of Snakes. Phil. Tr. clxvi. pp. 377-386, pi. xxxvii. 
Abstract of this paper in P. R. Soc. xxiv. pp. 259-261. 
Jan, G., & SoRDELLi, F. Iconographie Generate des Ophidiens. 
45® -48® livr. Paris : 4fo, 24 pis. 
These livraisons contain the following figures : — 
' Livr, 45®* Naia nigricollis, Reinh., pi. i. fig. 1, haje, L., fig. 2, tripu- 
dians, Merr., fig. 3. Vipera berus, L., pi. ii. fig. 1, and varieties prester, 
concolor, and lymncea, figs. 2-6, dmmodytes^ L., pi. iii. fig. 1, aspis^ L., 
figs. 2-7, atropos, L., pi. iv. figs. 1 & 2, nasicornis, Sh., figs. 3 & 4, cerastes^ 
H., pi V. fig. 1, Gornuta^ Schl. (^Cerastes lophophrys, D. & B.), fig. 2, 
avicenncd^ Alp. {Echidna atricauda, D. & B.), figs. 3 & 4, lebetina, Forsk. 
{Echidna mauritanica^ Guich.), pi. vi. fig. 1, elegans^ Daud., fig. 2, arietans, 
Merr., figs. 3 & 4. 
Livr. 46®* Crotalus durissiis, L., pi. i. figs. 1 *& 2, adamanteus, Pal. 
Beauv. {rhombifer, Latr.), pi. ii., horridus^ L., pi. iii. figs. 1 & 2, lugubris^ 
Jan, var. midtimaculata, fig. 3, miliarius, L.,.var. tergem.inus^ Say, fig. 4, 
cerastes^ Hallow., fig. 5, miliarius, L. {edioardsi, Bd. & Gir.), fig. 6. 
Trigonocephalus piscivorus, Lac., pi. iv. figs. 1-4, contortrix^ L., pi. v. 
fig. 1, hypnale^ Merr., figs. 2 & 3, blomhojffi^ Boie, figs. 4 & 5, halys^ Pall., 
pi. vi. fig. 1, rbodostoma, Reinw., fig.' 2. 
Bothrops lanceolatus, Merr., pi. vi. fig. 3, and Livr. 47®, pi. i. fig. 1. 
Livr. 47®- Bothrops bilineatus, Neuw., pi. i. figs. 2 & 3, atrox, L., pi. ii. 
figs. 1-4 (var. dims, Jan, and young var. tessellatus, Neuw.), jarataca, 
Neuw., pi. iii. figs. 1 & 2, pictus, Tsch., fig. 3,formosus, Schl., pi. v. fig. 1, 
nummifer, Riipp., fig. 2, alternatus, D. & B., pi. vi. fig. 1, schlegeli, Ber- 
thold, fig. 2. . 
Livr. 48®* Oligodon propinquus, Jan, pi. i. fig. 1, sublineatus, D. & B., 
fig. 2, subgriseus, D. & B., fig. 3, subpunctatus, D. & B., fig. 4. 
Chilorrhina villarsi, De Fil., fig. 5. 
Prosy mna jani, Biauc., pi. ii. fig. 1. 
